Concentrations of Radionuclides (226Ra, 232Th, 40K, and 137Cs) in Chernozems of Volgograd Oblast Sampled in Different Years
- Authors: Mingareeva E.V.1,2, Sanzharova N.I.2, Sukhacheva E.Y.1,3, Aparin B.F.1,3
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Affiliations:
- Dokuchaev Central Museum of Soil
- All-Russia Research Institute of Radiology and Agroecology
- Institute of Earth Sciences
- Issue: Vol 50, No 12 (2017)
- Pages: 1395-1405
- Section: Soil Chemistry
- URL: https://journals.rcsi.science/1064-2293/article/view/224271
- DOI: https://doi.org/10.1134/S106422931712002X
- ID: 224271
Cite item
Abstract
Data on the concentrations of natural (226Ra, 232Th and 40K) and artificial (137Cs) radionuclides and on the physicochemical properties of chernozems sampled in different years are presented. In 1952, upon the creation of the Penza-Kamensk state shelterbelt, three deep (up to 3 m) soil pits were examined within the former arable field under two-year-old plantations of ash and maple along the transect crossing the territory of the Beloprudskaya Experimental Station of the USSR Academy of Sciences in Volgograd oblast. The samples from these pits were included into the collection of dated soil samples of the Dokuchaev Central Soil Science Museum. Five pits were examined along the same transect in 2009: three pits under shelterbelts (analogues of the pits studied in 1952) and two pits on arable fields between the shelterbelts. In the past 57 years, certain changes took place in the soil structure, bulk density, and the content and composition of humus. The salt profile of soils changed significantly under the forests. The comparison of distribution patterns of natural soil radionuclides in 1952 and 2009 demonstrated their higher contents at the depth of 10–20 cm in 2009 (except for the western shelterbelt). Background concentrations of natural radionuclides in parent materials and relationships between their distributions and the salt profiles of soils have been determined; they are most clearly observed is the soils under shelterbelts. Insignificant contamination with 137Cs (up to 34 Bq/kg) has been found in the samples of 2009 from the upper (0–20 cm) horizon. The activity of 137Cs regularly decreases from the east to the west; the highest concentrations of this radionuclide are found in the topmost 10 cm. This allows us to suppose that 137Cs was brought with aerial dust by eastern winds, and the shelterbelts served as barriers to the wind flow.
About the authors
E. V. Mingareeva
Dokuchaev Central Museum of Soil; All-Russia Research Institute of Radiology and Agroecology
Email: soilmuseum@bk.ru
Russian Federation, Birzhevoi pr. 6, St. Petersburg, 199034; Kievskoe shosse 109 km, Obninsk, Kaluzhskaya oblast, 249032
N. I. Sanzharova
All-Russia Research Institute of Radiology and Agroecology
Email: soilmuseum@bk.ru
Russian Federation, Kievskoe shosse 109 km, Obninsk, Kaluzhskaya oblast, 249032
E. Yu. Sukhacheva
Dokuchaev Central Museum of Soil; Institute of Earth Sciences
Email: soilmuseum@bk.ru
Russian Federation, Birzhevoi pr. 6, St. Petersburg, 199034; Universitetskaya nab. 7/9, St. Petersburg, 199034
B. F. Aparin
Dokuchaev Central Museum of Soil; Institute of Earth Sciences
Author for correspondence.
Email: soilmuseum@bk.ru
Russian Federation, Birzhevoi pr. 6, St. Petersburg, 199034; Universitetskaya nab. 7/9, St. Petersburg, 199034